Match column $I$ (process) with column $II$ (application).

Column $I$	Column $II$
$A$. Dialysis	$a$. Cleansing action of soap
$B$. Peptization	$b$. Coagulation
$C$. Emulsification	$c$. Colloidal solution preparation
$D$. Electrophoresis	$d$. Purification of colloidal solution

• A
  $A-d, B-c, C-a, D-b$
• B
  $A-d, B-c, C-b, D-a$
• C
  $A-c, B-b, C-d, D-a$
• D
  $A-b, B-c, C-a, D-d$